Russian humanitarian convoy, destined for civilians in Ukrainian rebel-held city of Luhansk and other regions, could cross into Ukraine on August 22.
Trucks loaded with water, generators and sleeping bags began moving through Ukrainian customs on August 21.
270 trucks have been held up at the border for days amid Ukrainian concerns the convoy could be used to ferry supplies to pro-Russian rebels.
The International Committee of the Red Cross (ICRC) is due to accompany the aid convoy and has demanded security guarantees for its staff before the convoy sets off.
An ICRI official, Laurent Corbaz, said on August 21 that "there is an urgent need for essential items such as food and medical supplies" in Luhansk and other areas affected by the conflict.